It seems like there is a huge disconnect between people who know about FSD from using it and people who know about FSD from things they read on the internet. I have FSD, I use it every single day. I love it. If every car on the road had this the road would be a substantially safer place.
Until your car decides to randomly slam on its brakes and cause a pile up.
You're following too close to me for the conditions, you're distracted, or some combination of both.
My car might have to emergency brake for any number of reasons. This should never cause a pileup, and if it does it's your fault, not mine.